Improvement in stove-pipe-elbow machines



. I 2Sheets--Sheet1. BECKMANN 81.1. GIBSON.v

Stove-Pipe Elbow-Machines. No, 135,880. l Patentedreb.1a,137s.

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' PatemdFb.18,18.73`.

nvenjpr To all whom fit may concern.: 1

yHamilton and Sta-te of Ohio, have invented 'certain Improvements inStove-Pipe Elbows AThe rst part of our invention relates to antransversely from both 'side edges in such a "of'a machine'by means ofwhich the elbow is JOHN BECKMANN AND JOHN GIBSON, OF CINCINNATI, OHIO.

IMPROVEMENT IN S-TOVE -PIPE-ELBOW MACHINES.

Specification forming part of Letters Patent No. l 35i-,580, datedFebruary 18, 1873.

Beit known that we, JOHN BEOKMANN and JOHN GIBSON, of Cincinnati, in thecounty of and Machines for making thcsame, of which the following is aspecification:

improved stove-pipe elbow made from a piece ofsheet metal, which-'hasfirst had slits made manner that the surplus metal is taken up bylapping the cnt edges; the object of this part of'our invention being toenable a strong and durable elbow to be made by a cheap andsimplemachine. `The second part of our invention'relates to theconstruction and opera-tion formed and made; 'all of which will be fullyunderstood by reference to the following specification and drawingmaking a part of the saine, in which- Figure 1 is a verticallongitudinal section of a machine embodying 'our invention. Fig. 2 is aplan of the clamps of the same used to hold the metal. Fig. 3 is a planof the hinged circular jaws of the same used to form the metal and tohold it during apart of the process.` Fig. 4. is a planl of the sides ofa piece of sheet metal with a series of slits in each side edge, andwith a jog in the metal between each slit to allow the lapped edges totit closely. Fig. 5 represents a vertical longitudinal section of ourmanufactured elbow, and Fig. 6 is perspective View of our machine.

A A represent legs or posts upon which the machine is mounted;v B, thebed-plate of the machine; and C, a cylinder, around which the metal fromwhich the elbow is to be formed is placed and held in position to be fedinto the jaws. `l) isa bracket, to which the cylinder C is attached. Crepresents one side of the bracket extending back to rear end of themachine.` A similar one is on the opposite side, and their office is tostrengthen and su pport the bracket D. E is a bracket with a circularopening loosely surrounding the cylinder C, and from the top of whichprojects an arm, F, upon which is mounted some of the operatingmechanism. Gr is a projection on the cylinder C for forming the jog inthe metal. S Srepresent hinged circular jaws for clamping the metal tocylinder C in front of the bead G, which forms `the offsets or jogs p inthe metal; and K K circular clamps, which are opened and closed by'meansof links N N and weighted lever y attached to the shanks of K K. thisclamp K K is smaller than that of clamps S S. Q represents the front endof the cylinder- C, cylindrical,'but of smaller diameter and eccentricto the other portion' of C. When the piece of metal, slitted as shown inFig. 4,/is formed into a hollow pipe the rear part of the twowedge-shaped pieces will be forced by the'jaws K K to iit the cylinderQ. M represents a movable press-block in size made to correspond withVthat of the interior circumference of the elbow to be formed. It ismounted on rod W, and operated by abellcrank lever, I). R R represent a.circularhinged die or support for the metaloperated on by the roller tadapted tobe joined or locked together at the top, and having theirinterior .u

surfaces Haring tocorrespond with the curves of the elbow. M representsa stationary eccentric rigidly attached to M, and L a slotted crankcarrying a friction-roller, t, which is made to travel in its desiredpath by rolling on and around the eccentric M, and as it travels pressesthe metal against the flaring surfaces of R It so tightly as to closelyunite the slitted pieces of the elbow. X represents the pivot for theclamps K K and S S. Dies" l It It are also pivoted in a similar manner,and notches or gains are cut in the top part of clamps S S, so that theymay be locked firmly together. The clampjaws do not come quite togetherat the top, but rest on the metal pressed onto the surface of cylinderQ. A die for forming rivetholes is made upon the top part of Q betweenthe open ends of jaws 'K K' for the punch J to descend into to form arivet-hole in the metal. J is a-set which descends to form a head uponthe rivet, which is placed in a proper seat directly under it. Thesedevices are used to rivet the lapped parts of the metal together, but,instead of riveting, the parts may be brought together by means of teatsand recesses in the metal itself. The parts J J are operated by means ofthe parallel lever I I', the doublejointed links H H', and hand-lever T,to which the parts J J are attached, as shown. in Fig. 6.

OFFICE.

The circumference of The rivet set J is hinged to J so it may be turnedout sidewise to prevent its being operated with J when desired. V is ascraper and rod for removing burrs, &c., from cylinder C. Vis a shaftpassing through cylinder C, having the crankLrigidly attached to its endat the front of the machine, and a pulley, V, on its rear end for thepurpose of transmitting motion and power.

The following is the operation of the machine in the construction of anelbow: A piece of sheet metal is slitted as represented by p, Fig. 4,and offsets or jogs p may be made in itat the same time. The metal isthen rolled und riveted at one end, forming a pipe of the same diameterot' the elbow, which is then put on the cylinder C 5 and the clamps S Sbeing brought together the metal is pressed againstl the cylinder C andthe lirst oifset formed, when the jaws SS are released and the pipeadvanced a sufficient distance to form the next offset of the series inthe same manner. The press-block M, which np to this time has been inits advance position, is brought back against the end of G by means ofrod U and lever P, carrying with it the rst slitted piece on each side,depositing them over the metal now on Q. Clamps K K are then closed downand the now double pieces tightly pressed together, and, if desirable,into a secondary olfset, and there held until 1 iveted,'as beforedescribed. The metal is then advanced in the same manner as before, andthese different operations repeated, while at the -same time crank L androller t are put in motion to perform the office hereinbefore describedfor them. After the forming ot' each lap the clamps are loosened and themetal and block M advanced, and the several operations repeated untilthe desired number of laps are properly made and the elbow completed.

It is obvious that the distinctive features of the several parts can bevariously modified, and yet retain the principal features of ourinvention, which consists chiefly in forming an elbow from a slittedsheet of metal by lapping one piece upon another and pressing them intothe desired shape to form the curve of the elbow.

Having described our invention, what We claim as new, and desire tosecure by Letters Patent, is-

l. The clamps S S, K K', and It R, pressblock M, operated substantiallyas described, in combination with cylinder G and proper supportstherefor, whereby the metal is formed into an elbow ready to be riveted.

2. The slotted crank L, carrying roller t with mechanism causing it totravel around eccentric M', substantially as and for the purposedescribed.

3. The connecting mechanism composed of levers I I and T, links H H',punch J and set J', either or both, and proper supports for the whole,substantially as shownl and described. n

4. A stove -pipe elbow made from* sheet metal, slitted as shown anddescribed, when the slitted pieces are formed and united substantiallyas set forth. t

5. An elbow-machine, consisting of the elements embodied by the first,second, and third claims, when constructed and arranged substantially asherein described.

-Signed at Cincinnati, Ohio, this 11th day of January, 1873. x.

JOHN BECKMAN N JOHN GIBSON.

Witnesses:

EDWARD lovn, E. E. Woon.

